铸造2026，Vol.75Issue(1)：81-86,6.DOI:10.27014/j.cnki.zhuzao.2026.0012
管轴透盖裂纹失效机理及铸造工艺优化
Cracking Failure Mechanism of Tube Shaft Through-Cover and Optimization of Casting Process
摘要
Abstract
Aiming at the crack failure problems of the tube shaft through covers applied for large rotating machinery,and through a method of combining multi-scale characterization and numerical simulation,the crack failure mechanism of the HT250 through cover was systematically analyzed,and the casting process was optimized.It is found through investigation that the cracking failure is primarily caused by localized accumulation of type-E graphites,whiches destroying the matrix continuity and inducing microcracks and extending under the effects of alternating loads.Through increasing the carbon equivalent to 3.9 and raising primary inoculation addition to 0.43％,the type-E graphite formation can be effectively suppressed.Furthermore,by optimizing the casting process and cooling rate by using of MAGMASOFT software,and adding riser at the position of wall thickness variations,and adjusting melting processes,the casting defects have been significantly reduced,leading to substantial improvement in product qualification rate.关键词
裂纹失效/灰铸铁/E型石墨/碳当量Key words
cracking failure/grey cast iron/type-E graphite/carbon equivalent分类
矿业与冶金引用本文复制引用
史继之,吴少旗,汤帅,杨超,陈崇生..管轴透盖裂纹失效机理及铸造工艺优化[J].铸造,2026,75(1):81-86,6.基金项目
上海市自然科学基金面上项目(25ZR1401430) （25ZR1401430）
内蒙古自治区上海交通大学科技合作专项"科技兴蒙"上海交通大学行动计划(2023XYJG0001-01-01) （2023XYJG0001-01-01）
徐工精密-上海交通大学联合攻关项目"基于人工智能技术的铸件成本优化"(SA0501495). （SA0501495）
